Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 27.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 05/29/2019   02:12:28   (  68.86, 146.04) 05/29/2019   02:13:39  (  68.88, 145.99)    3.19                71
 05/29/2019   03:03:09   ( -68.76, -46.50) 05/29/2019   03:03:09  ( -68.77, -46.52)    1.49                 0
 05/29/2019   03:53:51   (  68.53, 121.11) 05/29/2019   03:52:38  (  68.55, 120.86)   10.50                73
 05/31/2019   18:28:56   (  68.90, -98.13) 05/31/2019   18:30:07  (  68.90, -98.11)    1.01                71
 05/31/2019   19:19:37   ( -68.79,  69.34) 05/31/2019   19:19:37  ( -68.79,  69.39)    2.19                 0
 05/31/2019   20:10:19   (  68.57,-123.06) 05/31/2019   20:09:06  (  68.57,-123.24)    7.32                73
 06/03/2019   10:45:23   (  68.94,  17.70) 06/03/2019   10:46:34  (  68.91,  17.79)    4.59                71
 06/03/2019   11:36:03   ( -68.77,-174.75) 06/03/2019   11:36:05  ( -68.75,-174.78)    2.02                 2
 06/03/2019   12:26:45   (  68.55,  -7.16) 06/03/2019   12:25:33  (  68.58,  -7.34)    8.18                72
 06/06/2019   03:01:51   (  68.98, 133.53) 06/06/2019   03:03:02  (  68.92, 133.68)    8.85                71
 06/06/2019   03:52:30   ( -68.75, -58.84) 06/06/2019   03:52:33  ( -68.77, -58.88)    2.28                 3
 06/06/2019   04:43:13   (  68.59, 108.67) 06/06/2019   04:42:01  (  68.59, 108.55)    5.01                72
 06/08/2019   19:18:18   (  68.97,-110.57) 06/08/2019   19:19:30  (  68.93,-110.43)    7.25                72
 06/08/2019   20:08:58   ( -68.78,  56.99) 06/08/2019   20:09:01  ( -68.77,  57.01)    1.49                 3
 06/08/2019   20:59:41   (  68.64,-135.50) 06/08/2019   20:58:28  (  68.65,-135.50)    1.66                73